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Exhesive

Exhesive is used to bond energex® Insulation Board to exterior grade gypsum sheathing and sound unpainted exterior grade wood based sheathings such as plywood and non-veneer boards. For use on other substrates, contact energex® for specific written approval.

Surface Preparation

Surfaces shall not be below 45° F or painted and must be clean, dry, structurally sound and free of grease or oil. American Plywood Association guidelines must be followed to insure proper installation of the wood based sheathings.

Cautions and Limitations

The adhesive must be allowed to form a skin prior to installation on the wall.

Notes

Exhesive IS NOT SUITABLE FOR BONDING INSULATION BOARD TO INSULATION BOARD.

Mixing

No mixing is required, water should not be added.

Job Conditions

Temperature for application of Exhesive must be 45° F or higher and must remain so for a minimum of 48 hours. Mixing - No mixing is required. Water should not be added.

Storage

Exhesive must be stored at 45° F or above in tightly sealed containers out of direct sunlight.

Application

All exposed edges of the insulation board must be wrapped with energex® mesh and embedded in Enermix. Exhesive shall be applied directly to the insulation board using a ¼” x ¼” x 1 ½” rounded notched trowel. The coated insulation board should be immediately pressed onto the surface of the substrate and slid into place. Apply firm pressure to the entire surface to insure complete contact between the coated insulation board and the substrate and insure that board edges abut tightly and that there is not any Exhesive between the boards. Temporary fasteners may be used, especially where contours exist to insure adequate contact between the coated insulation board and the substrate during the drying period. Care should be taken when removing the fasteners to avoid damage to the insulation board. Once the insulation board has been installed, wait a minimu m of 24 hours before working on the surface.

Drying Time

Drying time depends upon the air temperature relative humidity and the porosity of the sheathing. Under average drying conditions (70° F, 55% R.H.), Exhesive sets within 24 hours and achieves full cure in approximately seven days. Protect work from rain for at least 48 hours.

Working Time

After applying Exhesive to the insulation board, the coated board should be immediately attached to the substrate.

Bond Strength

(ASTM D-897) - 50 psi (plywood/plywood substrate failure).

Water Vapor Transmission

Does not create a water vapor barrier when installed according to application instructions.

Flexibility

Will accommodate reasonable movement of wood based sheathings due to expansion and contraction without reduction of bond.